diff --git a/22_langchain_ecosystem/langchain/00_gemini_langchain/LangChain_with_Gemini.ipynb b/22_langchain_ecosystem/langchain/00_gemini_langchain/LangChain_with_Gemini.ipynb
index f7ec4c9..17bdeca 100644
--- a/22_langchain_ecosystem/langchain/00_gemini_langchain/LangChain_with_Gemini.ipynb
+++ b/22_langchain_ecosystem/langchain/00_gemini_langchain/LangChain_with_Gemini.ipynb
@@ -585,7 +585,7 @@
       "outputs": [],
       "source": [
         "from typing import Dict\n",
-        "message : list[Dict[str:str]] = [\n",
+        "message : list[Dict[str,str]] = [\n",
         "    {\"role\": \"system\", \"content\": \"You are a helpful assistant.\"},\n",
         "    {\"role\": \"user\", \"content\": \"Which open source AI Model is best so far\"},\n",
         "]\n",
@@ -707,4 +707,4 @@
   },
   "nbformat": 4,
   "nbformat_minor": 0
-}
\ No newline at end of file
+}